Explanation of power terms related to UPS power supply (5)

Transient recovery time: When the load changes suddenly (0-, -0), the time required for the output voltage to recover to within the specified range, usually in millisecond (ms) level.

Filter: A device used to remove noise, filtering the input or output to obtain pure alternating current.

Shielding: A method of isolating and blocking electromagnetic radiation using physical principles.

Lightning arrester: It is a high-voltage protection element used at the input end of the equipment. If the voltage across both ends is higher than the protection specification value, a short circuit will occur internally and the input overvoltage will be absorbed.

Apparent power (APPARENTPOWER): VA, the change of its power is related to the effective value of voltage and current (ROOT-MEAN-SPUARE).

Modem: This device is a device that converts the analog signal on the telephone line into a digital signal that the PC can read, or converts the digital signal of the PC into an analog signal for transmission on the telephone line.

Random Access Memory [RANDOMACCESSMEMORY (RAM)]: Stores data required by the CPU in a dynamic manner.

Simple Network Management Protocol [SIMPLEMETWORKMANAGFEMENTPROTOCOL (SNMP)]: It is a widely used network management protocol that can help network administrators manage various devices in TCP/IP networks, and there are no complicated instructions, only basic concepts - STORE in FETDH (store-fetch) two kinds of instructions, simple, stable and flexible are its major advantages.

Instantaneous voltage drop: some will last from a few milliseconds to hundreds of milliseconds. Long-lasting or frequent voltage drops can cause computers and appliances to malfunction and reduce their useful life.

Phase Lock Circuits: Specifications for Phase Lock Speeds. The principle is: when the input voltage enters the UPS, the UPS will control the frequency of its output power to be the same as the frequency of the input power, so as to achieve the same input and output frequency and no phase. Time difference, but when there is a time difference between the output frequency and the input frequency, the UPS is powered by the battery or does not output power to the load.

Three-phase: The standard power system is a three-phase power supply. A phase is a sine wave that is 120 degrees out of phase, while a single phase is just one of the three phases.

Input voltage range: the range that the UPS allows the mains to vary, the larger the range, the better the adaptability of the UPS

Neutral wire: In a single-phase power system, the role of the neutral wire is to conduct feedback current, and it is distributed in the same area as the socket end and ground.

Distortion: Distortion is divided into waveform distortion, voltage distortion, etc. Whether it is volume distortion, it is calculated in percentage. The magnitude of the distortion is related to harmonics, voltage, current and power factor. (reference harmonics)

Mains: This is what we call alternating current (AC). There are three types of alternating current, voltage, current and frequency. The frequency can be divided into 50HZ (Hertz) and 60HZ (Hertz). The voltage distribution is 100VA-240VA. Generally, the normal AC waveform is a sine wave, but a staircase wave is used to form a similar sine wave, which is not suitable for motors or inductive load equipment.

Radio Frequency (RADIOFREPUNCY): This is an electromagnetic that exists in communication equipment or computer operating equipment. Some sources of radiation are emitted by the equipment's wiring or radiating antennas. In some cases, the magnitude may be too large. , resulting in interruption of electrical transmission or malfunction of computer operating equipment.

Synchronization: The output sine wave power generated by the UPS and the input AC power are both sine waves, and the two need to keep the same frequency and phase. This is called synchronization.

Synchronous converter (SYCHRONOUS): It is a converter between two power sources and loads.

Inrush current: When the electronic device is connected to the power outlet, since the device has been shut down for a period of time, the instantaneous current will charge the capacitor in the device, so a large instantaneous current of 3~10 microseconds will be generated and released by the power cord Its radiation affects other electronic equipment.

Surge: From a few hundred volts (amps) to several thousand volts (amps), the instantaneous high voltage lasting several thousand to hundreds of millions of seconds is a great potential danger for electronic equipment, which will cause data loss or electronic Component life is shortened, causing serious equipment damage or more serious consequences. t for two reasons